'Stronger' in the Bible

And the Lord said to her:Two nations are in your womb;two people will come from you and be separated.One people will be stronger than the other,and the older will serve the younger.

Whenever the stronger of the flock were breeding, Jacob placed the branches in the troughs, in full view of the flocks, and they would breed in front of the branches.

As for the weaklings of the flocks, he did not put out the branches. So it turned out that the weak sheep belonged to Laban and the stronger ones to Jacob.